In reply to alexm198:
> ...(BD Firstlight)? Every time I use it for its intended purpose (i.e. alpine bivvying) I find the condensation is a real problem, and it ends up soaking pretty much everything.
I've used a BD FL and various Biblers over the years and had condensation problems in ALL of them, including in the high, cold and dry location for which they are meant to be best. I've vented them well but it makes little difference and prolonged use in very cold conditions causes an unacceptable buildup.
I simply don't use them on most trips now, just the Firstlight when low weight is a priority. Double wall tents are much better on cold expeditions, though obviously not much good for Alpine bivis. Huts are better for that...